[Buildroot] [PATCH v4 2/4] package/systemd: allow empty systemd default target

[Norbert Lange <nolange79@gmail.com>]

Currently, we forcefully require that a default target be specified.
However, systemd does install a default target, but it's not
possible to just use that target.

Allow the user to blank-out the config setting to not override
whatever systemd installed and keep that.

Signed-off-by: Norbert Lange <nolange79@gmail.com>
---
v1->v2:

*   completely remove the hook if var is empty
*   adjusted commit message

v2->v3:

*   v2 was broken, dint want to send it. now fixed/correct

Signed-off-by: Norbert Lange <nolange79@gmail.com>
---
 package/systemd/systemd.mk | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/package/systemd/systemd.mk b/package/systemd/systemd.mk
index b5628f5155..bacde5221b 100644
--- a/package/systemd/systemd.mk
+++ b/package/systemd/systemd.mk
@@ -583,17 +583,20 @@ ifneq ($(SYSTEMD_FALLBACK_HOSTNAME),)
 SYSTEMD_CONF_OPTS += -Dfallback-hostname=$(SYSTEMD_FALLBACK_HOSTNAME)
 endif
 
+ifneq ($(call qstrip,$(BR2_PACKAGE_SYSTEMD_DEFAULT_TARGET)),)
 define SYSTEMD_INSTALL_INIT_HOOK
 	ln -fs "$(call qstrip,$(BR2_PACKAGE_SYSTEMD_DEFAULT_TARGET))" \
 		$(TARGET_DIR)/usr/lib/systemd/system/default.target
 endef
 
+SYSTEMD_POST_INSTALL_TARGET_HOOKS += SYSTEMD_INSTALL_INIT_HOOK
+endif
+
 define SYSTEMD_INSTALL_MACHINEID_HOOK
 	touch $(TARGET_DIR)/etc/machine-id
 endef
 
 SYSTEMD_POST_INSTALL_TARGET_HOOKS += \
-	SYSTEMD_INSTALL_INIT_HOOK \
 	SYSTEMD_INSTALL_MACHINEID_HOOK
 
 define SYSTEMD_INSTALL_IMAGES_CMDS
-- 
2.35.1

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